2 * sys-osf.c - System-dependent procedures for setting up
3 * PPP interfaces on OSF/1 systems which use the STREAMS ppp interface.
5 * Copyright (c) 1989 Carnegie Mellon University.
8 * Redistribution and use in source and binary forms are permitted
9 * provided that the above copyright notice and this paragraph are
10 * duplicated in all such forms and that any documentation,
11 * advertising materials, and other materials related to such
12 * distribution and use acknowledge that the software was developed
13 * by Carnegie Mellon University. The name of the
14 * University may not be used to endorse or promote products derived
15 * from this software without specific prior written permission.
16 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
18 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
22 static char rcsid[] = "$Id: sys-osf.c,v 1.8 1996/04/04 04:06:29 paulus Exp $";
40 #include <sys/types.h>
41 #include <sys/socket.h>
43 #include <sys/stream.h>
44 #include <sys/stropts.h>
47 #include <net/ppp_defs.h>
48 #include <net/ppp_str.h>
49 #include <net/route.h>
50 #include <net/if_arp.h>
51 #include <netinet/in.h>
56 #define ifr_mtu ifr_metric
59 #define MAXMODULES 10 /* max number of module names to save */
60 static struct modlist {
61 char modname[FMNAMESZ+1];
62 } str_modules[MAXMODULES];
63 static int str_module_count = 0;
64 static int pushed_ppp;
65 static int closed_stdio;
67 static int restore_term; /* 1 => we've munged the terminal */
68 static struct termios inittermios; /* Initial TTY termios */
69 static struct winsize wsinfo; /* Initial window size info */
70 static int initfdflags = -1; /* Initial file descriptor flags for fd */
72 static int sockfd; /* socket for doing interface ioctls */
74 int orig_ttyfd = -1; /* Original ttyfd if we did a streamify() */
76 static int if_is_up; /* Interface has been marked up */
77 static u_int32_t ifaddrs[2]; /* Local and remote addrs we've set */
78 static u_int32_t default_route_gateway; /* Gateway for default route added */
79 static u_int32_t proxy_arp_addr; /* Addr for proxy arp entry added */
81 /* Prototypes for procedures local to this file. */
82 static int translate_speed __P((int));
83 static int baud_rate_of __P((int));
84 static int get_ether_addr __P((u_int32_t, struct sockaddr *));
88 * sys_init - System-dependent initialization.
93 openlog("pppd", LOG_PID | LOG_NDELAY, LOG_PPP);
94 setlogmask(LOG_UPTO(LOG_INFO));
96 setlogmask(LOG_UPTO(LOG_DEBUG));
98 /* Get an internet socket for doing socket ioctl's on. */
99 if ((sockfd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
100 syslog(LOG_ERR, "Couldn't create IP socket: %m");
106 * sys_cleanup - restore any system state we modified before exiting:
107 * mark the interface down, delete default route and/or proxy arp entry.
108 * This should call die() because it's called from die().
116 strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
117 if (ioctl(sockfd, SIOCGIFFLAGS, &ifr) >= 0
118 && ((ifr.ifr_flags & IFF_UP) != 0)) {
119 ifr.ifr_flags &= ~IFF_UP;
120 ioctl(sockfd, SIOCSIFFLAGS, &ifr);
124 cifaddr(0, ifaddrs[0], ifaddrs[1]);
125 if (default_route_gateway)
126 cifdefaultroute(0, default_route_gateway);
128 cifproxyarp(0, proxy_arp_addr);
132 * note_debug_level - note a change in the debug level.
138 syslog(LOG_INFO, "Debug turned ON, Level %d", debug);
139 setlogmask(LOG_UPTO(LOG_DEBUG));
141 setlogmask(LOG_UPTO(LOG_WARNING));
146 * daemon - Detach us from the terminal session.
149 daemon(nochdir, noclose)
150 int nochdir, noclose;
154 if ((pid = fork()) < 0)
157 exit(0); /* parent dies */
162 fclose(stdin); /* don't need stdin, stdout, stderr */
170 char pipename[] = "/dev/streams/pipe";
173 * ppp_available - check if this kernel supports PPP.
180 fd = open(pipename, O_RDONLY, 0);
182 return 0; /* can't find out - assume we don't have ppp */
183 ret = ioctl(fd, I_FIND, "pppasync") >= 0;
190 * streampipe -- Opens a STREAMS based pipe. Used by streamify().
194 streampipe(int fd[2])
196 if ((fd[0]=open(pipename, O_RDWR)) == -1)
198 else if ((fd[1]=open(pipename, O_RDWR)) == -1) {
201 } else if (ioctl(fd[0], I_PIPE, fd[1]) != 0) {
206 return(ioctl(fd[0], I_PUSH, "pipemod"));
211 * streamify -- Needed for DEC OSF/1, since tty devices are not STREAMS
212 * modules (but ptys are, and pipes can be).
215 #define BUFFSIZE 1000 /* Size of buffer for streamify() */
222 int ret, fret, rret, maxfd;
223 static char buffer[BUFFSIZE];
226 if (streampipe(fdes) != 0)
227 syslog(LOG_ERR, "streampipe(): %m\n");
228 else if (isastream(fdes[0]) == 1) {
229 if ((fret=fork()) < 0) {
230 syslog(LOG_ERR, "fork(): %m\n");
231 } else if (fret == 0) {
232 /* Process to forward things from pipe to tty */
233 sigemptyset(&(sa.sa_mask));
234 sa.sa_handler = SIG_DFL;
236 sigaction(SIGHUP, &sa, NULL); /* Go back to default actions */
237 sigaction(SIGINT, &sa, NULL); /* for changed signals. */
238 sigaction(SIGTERM, &sa, NULL);
239 sigaction(SIGCHLD, &sa, NULL);
240 sigaction(SIGUSR1, &sa, NULL);
241 sigaction(SIGUSR2, &sa, NULL);
244 maxfd = (fdes[1]>fd)?fdes[1]:fd;
247 FD_SET(fdes[1], &readfds);
248 FD_SET(fd, &readfds);
249 ret = select(maxfd+1, &readfds, NULL, NULL, NULL);
250 if (FD_ISSET(fd, &readfds)) {
251 rret = read(fd, buffer, BUFFSIZE);
253 MAINDEBUG((LOG_DEBUG, "slave died: EOF on tty."));
256 write(fdes[1], buffer, rret);
259 if (FD_ISSET(fdes[1], &readfds)) {
260 rret = read(fdes[1], buffer, BUFFSIZE);
262 MAINDEBUG((LOG_DEBUG, "slave died: EOF on pipe."));
265 write(fd, buffer, rret);
281 * establish_ppp - Turn the serial port into a ppp interface.
289 if (isastream(fd) != 1) {
290 if ((ttyfd = fd = streamify(fd)) < 0) {
291 syslog(LOG_ERR, "Couldn't get a STREAMS module!\n");
296 /* go through and save the name of all the modules, then pop em */
298 if (ioctl(fd, I_LOOK, str_modules[str_module_count].modname) < 0 ||
299 ioctl(fd, I_POP, 0) < 0)
301 MAINDEBUG((LOG_DEBUG, "popped stream module : %s",
302 str_modules[str_module_count].modname));
306 /* now push the async/fcs module */
307 if (ioctl(fd, I_PUSH, "pppasync") < 0) {
308 syslog(LOG_ERR, "ioctl(I_PUSH, ppp_async): %m");
311 /* push the compress module */
312 if (ioctl(fd, I_PUSH, "pppcomp") < 0) {
313 syslog(LOG_WARNING, "ioctl(I_PUSH, ppp_comp): %m");
315 /* finally, push the ppp_if module that actually handles the */
316 /* network interface */
317 if (ioctl(fd, I_PUSH, "pppif") < 0) {
318 syslog(LOG_ERR, "ioctl(I_PUSH, ppp_if): %m");
322 /* read mode, message non-discard mode */
323 if (ioctl(fd, I_SRDOPT, RMSGN|RPROTNORM) < 0) {
324 syslog(LOG_ERR, "ioctl(I_SRDOPT, RMSGN): %m");
328 * Find out which interface we were given.
329 * (ppp_if handles this ioctl)
331 if (ioctl(fd, (int)SIOCGETU, &ifunit) < 0) {
332 syslog(LOG_ERR, "ioctl(SIOCGETU): %m");
336 /* Set debug flags in driver */
337 if (ioctl(fd, (int)SIOCSIFDEBUG, &kdebugflag) < 0) {
338 syslog(LOG_ERR, "ioctl(SIOCSIFDEBUG): %m");
341 /* close stdin, stdout, stderr if they might refer to the device */
342 if (default_device && !closed_stdio) {
345 for (i = 0; i <= 2; ++i)
346 if (i != fd && i != sockfd)
352 * Set device for non-blocking reads.
354 if ((initfdflags = fcntl(fd, F_GETFL)) == -1
355 || fcntl(fd, F_SETFL, initfdflags | O_NONBLOCK) == -1) {
356 syslog(LOG_WARNING, "Couldn't set device to non-blocking mode: %m");
360 /* Debugging routine.... */
362 void prstrstack(int fd)
365 struct str_mlist names[20];
368 sl.sl_modlist = names;
370 ret = ioctl(fd, I_LIST, &sl);
373 MAINDEBUG((LOG_DEBUG, "Current streams modules:\n"));
374 for (i=0; i<sl.sl_nmods; i++)
375 MAINDEBUG((LOG_DEBUG," %s\n", names[i].l_name));
377 MAINDEBUG((LOG_DEBUG,"I_LIST ioctl() failed.\n"));
383 * disestablish_ppp - Restore the serial port to normal operation.
384 * It attempts to reconstruct the stream with the previously popped
385 * modules. This shouldn't call die() because it's called from die().
394 /* Reset non-blocking mode on the file descriptor. */
395 if (initfdflags != -1 && fcntl(fd, F_SETFL, initfdflags) < 0)
396 syslog(LOG_WARNING, "Couldn't restore device fd flags: %m");
400 /* we can't push or pop modules after the stream has hung up */
401 str_module_count = 0;
402 restore_term = 0; /* nor can we fix up terminal settings */
407 while (ioctl(fd, I_POP, 0) == 0) /* pop any we pushed */
411 for (; str_module_count > 0; str_module_count--) {
412 if (ioctl(fd, I_PUSH, str_modules[str_module_count-1].modname)) {
414 syslog(LOG_WARNING, "str_restore: couldn't push module %s: %m",
415 str_modules[str_module_count-1].modname);
417 MAINDEBUG((LOG_INFO, "str_restore: pushed module %s",
418 str_modules[str_module_count-1].modname));
422 if (orig_ttyfd >= 0) {
432 * clean_check - check whether the link seems to be 8-bit clean.
439 * Check whether the link seems not to be 8-bit clean.
441 if (ioctl(ttyfd, (int)SIOCGIFDEBUG, (caddr_t) &flags) == 0) {
443 switch (~flags & PAI_FLAGS_HIBITS) {
445 s = "bit 7 set to 1";
448 s = "bit 7 set to 0";
450 case PAI_FLAGS_PAR_EVEN:
453 case PAI_FLAGS_PAR_ODD:
458 syslog(LOG_WARNING, "Serial link is not 8-bit clean:");
459 syslog(LOG_WARNING, "All received characters had %s", s);
466 * List of valid speeds.
469 int speed_int, speed_val;
541 * Translate from bits/second to a speed_t.
547 struct speed *speedp;
551 for (speedp = speeds; speedp->speed_int; speedp++)
552 if (bps == speedp->speed_int)
553 return speedp->speed_val;
554 syslog(LOG_WARNING, "speed %d not supported", bps);
559 * Translate from a speed_t to bits/second.
565 struct speed *speedp;
569 for (speedp = speeds; speedp->speed_int; speedp++)
570 if (speed == speedp->speed_val)
571 return speedp->speed_int;
576 * set_up_tty: Set up the serial port on `fd' for 8 bits, no parity,
577 * at the requested speed, etc. If `local' is true, set CLOCAL
578 * regardless of whether the modem option was specified.
581 set_up_tty(fd, local)
587 if (tcgetattr(fd, &tios) < 0) {
588 syslog(LOG_ERR, "tcgetattr: %m");
594 ioctl(fd, TIOCGWINSZ, &wsinfo);
597 tios.c_cflag &= ~(CSIZE | CSTOPB | PARENB | CLOCAL);
599 tios.c_cflag |= CRTSCTS;
600 else if (crtscts < 0)
601 tios.c_cflag &= ~CRTSCTS;
603 tios.c_cflag |= CS8 | CREAD | HUPCL;
605 tios.c_cflag |= CLOCAL;
606 tios.c_iflag = IGNBRK | IGNPAR;
610 tios.c_cc[VTIME] = 0;
613 tios.c_iflag |= IXON | IXOFF;
614 tios.c_cc[VSTOP] = 0x13; /* DC3 = XOFF = ^S */
615 tios.c_cc[VSTART] = 0x11; /* DC1 = XON = ^Q */
618 speed = translate_speed(inspeed);
620 cfsetospeed(&tios, speed);
621 cfsetispeed(&tios, speed);
623 speed = cfgetospeed(&tios);
625 * We can't proceed if the serial port speed is B0,
626 * since that implies that the serial port is disabled.
629 syslog(LOG_ERR, "Baud rate for %s is 0; need explicit baud rate",
635 if (tcsetattr(fd, TCSAFLUSH, &tios) < 0) {
636 syslog(LOG_ERR, "tcsetattr: %m");
640 baud_rate = inspeed = baud_rate_of(speed);
645 * restore_tty - restore the terminal to the saved settings.
652 if (!default_device) {
654 * Turn off echoing, because otherwise we can get into
655 * a loop with the tty and the modem echoing to each other.
656 * We presume we are the sole user of this tty device, so
657 * when we close it, it will revert to its defaults anyway.
659 inittermios.c_lflag &= ~(ECHO | ECHONL);
661 if (tcsetattr(fd, TCSAFLUSH, &inittermios) < 0)
663 syslog(LOG_WARNING, "tcsetattr: %m");
664 ioctl(fd, TIOCSWINSZ, &wsinfo);
670 * setdtr - control the DTR line on the serial port.
671 * This is called from die(), so it shouldn't call die().
677 int modembits = TIOCM_DTR;
679 ioctl(fd, (on? TIOCMBIS: TIOCMBIC), &modembits);
684 * output - Output PPP packet.
697 log_packet(p, len, "sent ");
700 str.buf = (caddr_t) p;
702 while (putmsg(ttyfd, NULL, &str, 0) < 0) {
703 if (--retries < 0 || (errno != EWOULDBLOCK && errno != EAGAIN)) {
705 syslog(LOG_ERR, "Couldn't send packet: %m");
709 pfd.events = POLLOUT;
710 poll(&pfd, 1, 250); /* wait for up to 0.25 seconds */
715 * wait_input - wait for input, for a length of time specified in *timo.
719 struct timeval *timo;
724 t = timo == NULL? -1: timo->tv_sec * 1000 + timo->tv_usec / 1000;
726 pfd.events = POLLIN | POLLPRI | POLLHUP;
727 if (poll(&pfd, 1, t) < 0 && errno != EINTR) {
728 syslog(LOG_ERR, "poll: %m");
734 * read_packet - get a PPP packet from the serial device.
740 struct strbuf str, ctl;
742 unsigned char ctlbuf[16];
744 str.maxlen = PPP_MTU + PPP_HDRLEN;
745 str.buf = (caddr_t) buf;
746 ctl.maxlen = sizeof(ctlbuf);
747 ctl.buf = (caddr_t) ctlbuf;
749 len = getmsg(ttyfd, &ctl, &str, &i);
751 if (errno == EAGAIN || errno == EWOULDBLOCK || errno == EINTR) {
754 syslog(LOG_ERR, "getmsg %m");
758 MAINDEBUG((LOG_DEBUG, "getmsg returned 0x%x",len));
760 syslog(LOG_NOTICE, "got ctrl msg len %d %x %x\n", ctl.len,
761 ctlbuf[0], ctlbuf[1]);
764 MAINDEBUG((LOG_DEBUG, "getmsg short return length %d", str.len));
773 * ppp_send_config - configure the transmit characteristics of
777 ppp_send_config(unit, mtu, asyncmap, pcomp, accomp)
785 strncpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name));
787 if (ioctl(sockfd, (int)SIOCSIPMTU, (caddr_t) &ifr) < 0) {
788 syslog(LOG_ERR, "ioctl(SIOCSIPMTU): %m");
792 if(ioctl(ttyfd, (int)SIOCSIFASYNCMAP, (caddr_t) &asyncmap) < 0) {
793 syslog(LOG_ERR, "ioctl(SIOCSIFASYNCMAP): %m");
798 if(ioctl(ttyfd, (int)SIOCSIFCOMPPROT, &c) < 0) {
799 syslog(LOG_ERR, "ioctl(SIOCSIFCOMPPROT): %m");
804 if(ioctl(ttyfd, (int)SIOCSIFCOMPAC, &c) < 0) {
805 syslog(LOG_ERR, "ioctl(SIOCSIFCOMPAC): %m");
812 * ppp_set_xaccm - set the extended transmit ACCM for the interface.
815 ppp_set_xaccm(unit, accm)
819 if (ioctl(ttyfd, (int)SIOCSIFXASYNCMAP, accm) < 0 && errno != ENOTTY)
820 syslog(LOG_WARNING, "ioctl(set extended ACCM): %m");
825 * ppp_recv_config - configure the receive-side characteristics of
829 ppp_recv_config(unit, mru, asyncmap, pcomp, accomp)
836 if (ioctl(ttyfd, (int)SIOCSIFMRU, &mru) < 0) {
837 syslog(LOG_ERR, "ioctl(SIOCSIFMRU): %m");
840 if (ioctl(ttyfd, (int)SIOCSIFRASYNCMAP, (caddr_t) &asyncmap) < 0) {
841 syslog(LOG_ERR, "ioctl(SIOCSIFRASYNCMAP): %m");
844 c = 2 + (pcomp? 1: 0);
845 if(ioctl(ttyfd, (int)SIOCSIFCOMPPROT, &c) < 0) {
846 syslog(LOG_ERR, "ioctl(SIOCSIFCOMPPROT): %m");
849 c = 2 + (accomp? 1: 0);
850 if (ioctl(ttyfd, (int)SIOCSIFCOMPAC, &c) < 0) {
851 syslog(LOG_ERR, "ioctl(SIOCSIFCOMPAC): %m");
856 * ccp_test - ask kernel whether a given compression method
857 * is acceptable for use.
860 ccp_test(unit, opt_ptr, opt_len, for_transmit)
861 int unit, opt_len, for_transmit;
864 struct ppp_option_data data;
866 if ((unsigned) opt_len > MAX_PPP_OPTION)
867 opt_len = MAX_PPP_OPTION;
868 data.length = opt_len;
869 data.transmit = for_transmit;
870 BCOPY(opt_ptr, data.opt_data, opt_len);
871 if (ioctl(ttyfd, (int)SIOCSCOMPRESS, (caddr_t) &data) >= 0)
873 return (errno == ENOSR)? 0: -1;
877 * ccp_flags_set - inform kernel about the current state of CCP.
880 ccp_flags_set(unit, isopen, isup)
881 int unit, isopen, isup;
885 x = (isopen? 1: 0) + (isup? 2: 0);
886 if (ioctl(ttyfd, (int)SIOCSIFCOMP, (caddr_t) &x) < 0 && errno != ENOTTY)
887 syslog(LOG_ERR, "ioctl (SIOCSIFCOMP): %m");
891 * ccp_fatal_error - returns 1 if decompression was disabled as a
892 * result of an error detected after decompression of a packet,
893 * 0 otherwise. This is necessary because of patent nonsense.
896 ccp_fatal_error(unit)
901 if (ioctl(ttyfd, (int)SIOCGIFCOMP, (caddr_t) &x) < 0) {
902 syslog(LOG_ERR, "ioctl(SIOCGIFCOMP): %m");
905 return x & CCP_FATALERROR;
909 * sifvjcomp - config tcp header compression
912 sifvjcomp(u, vjcomp, cidcomp, maxcid)
913 int u, vjcomp, cidcomp, maxcid;
917 x = (vjcomp? 1: 0) + (cidcomp? 0: 2) + (maxcid << 4);
918 if (ioctl(ttyfd, (int)SIOCSIFVJCOMP, (caddr_t) &x) < 0) {
919 syslog(LOG_ERR, "ioctl(SIOCSIFVJCOMP): %m");
926 * sifup - Config the interface up and enable IP packets to pass.
935 strncpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name));
936 if (ioctl(sockfd, (int)SIOCGIFFLAGS, (caddr_t) &ifr) < 0) {
937 syslog(LOG_ERR, "ioctl (SIOCGIFFLAGS): %m");
940 ifr.ifr_flags |= IFF_UP;
941 if (ioctl(sockfd, (int)SIOCSIFFLAGS, (caddr_t) &ifr) < 0) {
942 syslog(LOG_ERR, "ioctl(SIOCSIFFLAGS): %m");
946 npi.protocol = PPP_IP;
947 npi.mode = NPMODE_PASS;
948 if (ioctl(ttyfd, (int)SIOCSETNPMODE, &npi) < 0) {
949 if (errno != ENOTTY) {
950 syslog(LOG_ERR, "ioctl(SIOCSETNPMODE): %m");
958 * sifdown - Config the interface down.
969 npi.protocol = PPP_IP;
970 npi.mode = NPMODE_ERROR;
971 if (ioctl(ttyfd, (int)SIOCSETNPMODE, (caddr_t) &npi) < 0) {
972 if (errno != ENOTTY) {
973 syslog(LOG_ERR, "ioctl(SIOCSETNPMODE): %m");
978 strncpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name));
979 if (ioctl(sockfd, (int)SIOCGIFFLAGS, (caddr_t) &ifr) < 0) {
980 syslog(LOG_ERR, "ioctl (SIOCGIFFLAGS): %m");
983 ifr.ifr_flags &= ~IFF_UP;
984 if (ioctl(sockfd, (int)SIOCSIFFLAGS, (caddr_t) &ifr) < 0) {
985 syslog(LOG_ERR, "ioctl(SIOCSIFFLAGS): %m");
994 * SET_SA_FAMILY - initialize a struct sockaddr, setting the sa_family field.
996 #define SET_SA_FAMILY(addr, family) \
997 BZERO((char *) &(addr), sizeof(addr)); \
998 addr.sa_family = (family); \
999 addr.sa_len = sizeof ((addr))
1002 * sifaddr - Config the interface IP addresses and netmask.
1010 struct ifaliasreq addreq;
1015 /* flush old address, if any
1017 bzero(&ifr, sizeof (ifr));
1018 strncpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name));
1019 SET_SA_FAMILY(ifr.ifr_addr, AF_INET);
1020 ((struct sockaddr_in *) &ifr.ifr_addr)->sin_addr.s_addr = o;
1021 if ((ioctl(sockfd, (int)SIOCDIFADDR, (caddr_t) &ifr) < 0)
1022 && errno != EADDRNOTAVAIL) {
1023 syslog(LOG_ERR, "ioctl(SIOCDIFADDR): %m");
1027 bzero(&addreq, sizeof (addreq));
1028 strncpy(addreq.ifra_name, ifname, sizeof (addreq.ifra_name));
1029 SET_SA_FAMILY(addreq.ifra_addr, AF_INET);
1030 SET_SA_FAMILY(addreq.ifra_broadaddr, AF_INET);
1031 ((struct sockaddr_in *)&addreq.ifra_addr)->sin_addr.s_addr = o;
1032 ((struct sockaddr_in *)&addreq.ifra_broadaddr)->sin_addr.s_addr = h;
1035 ((struct sockaddr_in *)&addreq.ifra_mask)->sin_addr.s_addr = m;
1036 addreq.ifra_mask.sa_len = sizeof (struct sockaddr);
1037 syslog(LOG_INFO, "Setting interface mask to %s\n", ip_ntoa(m));
1040 /* install new src/dst and (possibly) netmask
1042 if (ioctl(sockfd, SIOCPIFADDR, &addreq) < 0) {
1043 syslog(LOG_ERR, "ioctl(SIOCPIFADDR): %m");
1053 * cifaddr - Clear the interface IP addresses, and delete routes
1054 * through the interface if possible.
1064 bzero(&ifr, sizeof (ifr));
1065 strncpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name));
1066 SET_SA_FAMILY(ifr.ifr_addr, AF_INET);
1067 ((struct sockaddr_in *) &ifr.ifr_addr)->sin_addr.s_addr = o;
1068 if (ioctl(sockfd, (int)SIOCDIFADDR, (caddr_t) &ifr) < 0) {
1069 syslog(LOG_ERR, "ioctl(SIOCDIFADDR): %m");
1076 * sifdefaultroute - assign a default route through the address given.
1079 sifdefaultroute(u, g)
1085 BZERO(&rt, sizeof(rt));
1086 SET_SA_FAMILY(rt.rt_dst, AF_INET);
1087 SET_SA_FAMILY(rt.rt_gateway, AF_INET);
1088 ((struct sockaddr_in *) &rt.rt_gateway)->sin_addr.s_addr = g;
1089 rt.rt_flags = RTF_GATEWAY;
1090 if (ioctl(sockfd, (int)SIOCADDRT, &rt) < 0) {
1091 syslog(LOG_ERR, "default route ioctl(SIOCADDRT): %m");
1094 default_route_gateway = g;
1099 * cifdefaultroute - delete a default route through the address given.
1102 cifdefaultroute(u, g)
1108 BZERO(&rt, sizeof(rt));
1109 SET_SA_FAMILY(rt.rt_dst, AF_INET);
1110 SET_SA_FAMILY(rt.rt_gateway, AF_INET);
1111 ((struct sockaddr_in *) &rt.rt_gateway)->sin_addr.s_addr = g;
1112 rt.rt_flags = RTF_GATEWAY;
1113 if (ioctl(sockfd, (int)SIOCDELRT, &rt) < 0) {
1114 syslog(LOG_ERR, "default route ioctl(SIOCDELRT): %m");
1117 default_route_gateway = 0;
1122 * sifproxyarp - Make a proxy ARP entry for the peer.
1125 sifproxyarp(unit, hisaddr)
1129 struct arpreq arpreq;
1131 BZERO(&arpreq, sizeof(arpreq));
1134 * Get the hardware address of an interface on the same subnet
1135 * as our local address.
1137 if (!get_ether_addr(hisaddr, &arpreq.arp_ha)) {
1138 syslog(LOG_WARNING, "Cannot determine ethernet address for proxy ARP");
1142 SET_SA_FAMILY(arpreq.arp_pa, AF_INET);
1143 ((struct sockaddr_in *) &arpreq.arp_pa)->sin_addr.s_addr = hisaddr;
1144 arpreq.arp_flags = ATF_PERM | ATF_PUBL;
1145 if (ioctl(sockfd, (int)SIOCSARP, (caddr_t)&arpreq) < 0) {
1146 syslog(LOG_ERR, "ioctl(SIOCSARP): %m");
1150 proxy_arp_addr = hisaddr;
1155 * cifproxyarp - Delete the proxy ARP entry for the peer.
1158 cifproxyarp(unit, hisaddr)
1162 struct arpreq arpreq;
1164 BZERO(&arpreq, sizeof(arpreq));
1165 SET_SA_FAMILY(arpreq.arp_pa, AF_INET);
1166 ((struct sockaddr_in *) &arpreq.arp_pa)->sin_addr.s_addr = hisaddr;
1167 if (ioctl(sockfd, (int)SIOCDARP, (caddr_t)&arpreq) < 0) {
1168 syslog(LOG_ERR, "ioctl(SIOCDARP): %m");
1176 * get_ether_addr - get the hardware address of an interface on the
1177 * the same subnet as ipaddr.
1184 get_ether_addr(ipaddr, hwaddr)
1186 struct sockaddr *hwaddr;
1188 struct ifreq *ifr, *ifend, *ifp;
1190 struct sockaddr_dl *dla;
1193 struct ifreq ifs[MAX_IFS];
1194 struct ifdevea ifdevreq;
1196 ifc.ifc_len = sizeof(ifs);
1198 if (ioctl(sockfd, (int)SIOCGIFCONF, &ifc) < 0) {
1199 perror("ioctl(SIOCGIFCONF)");
1204 * Scan through looking for an interface with an Internet
1205 * address on the same subnet as `ipaddr'.
1207 ifend = (struct ifreq *) (ifc.ifc_buf + ifc.ifc_len);
1208 for (ifr = ifc.ifc_req; ifr < ifend; +ifr = (struct ifreq *)
1209 ((char *)&ifr->ifr_addr + ifr->ifr_addr.sa_len) {
1210 if (ifr->ifr_addr.sa_family == AF_INET) {
1211 ina = ((struct sockaddr_in *) &ifr->ifr_addr)->sin_addr.s_addr;
1212 strncpy(ifreq.ifr_name, ifr->ifr_name, sizeof(ifreq.ifr_name));
1214 * Check that the interface is up, and not point-to-point
1217 if (ioctl(sockfd, (int)SIOCGIFFLAGS, &ifreq) < 0)
1219 if ((ifreq.ifr_flags &
1220 (IFF_UP|IFF_BROADCAST|IFF_POINTOPOINT|IFF_LOOPBACK|IFF_NOARP))
1221 != (IFF_UP|IFF_BROADCAST))
1224 * Get its netmask and check that it's on the right subnet.
1226 if (ioctl(sockfd, (int)SIOCGIFNETMASK, &ifreq) < 0)
1228 mask = ((struct sockaddr_in *) &ifreq.ifr_addr)->sin_addr.s_addr;
1229 if ((ipaddr & mask) != (ina & mask))
1238 syslog(LOG_INFO, "found interface %s for proxy arp", ifr->ifr_name);
1240 strncpy(ifdevreq.ifr_name, ifr->ifr_name, sizeof(ifdevreq.ifr_name));
1242 if (ioctl(sockfd, (int)SIOCRPHYSADDR, &ifdevreq) < 0) {
1243 perror("ioctl(SIOCRPHYSADDR)");
1247 hwaddr->sa_family = AF_UNSPEC;
1248 memcpy(hwaddr->sa_data, ifdevreq.current_pa, sizeof(ifdevreq.current_pa));
1254 * Return user specified netmask, modified by any mask we might determine
1255 * for address `addr' (in network byte order).
1256 * Here we scan through the system's list of interfaces, looking for
1257 * any non-point-to-point interfaces which might appear to be on the same
1258 * network as `addr'. If we find any, we OR in their netmask to the
1259 * user-specified netmask.
1265 u_int32_t mask, nmask, ina;
1266 struct ifreq *ifr, *ifend, ifreq;
1268 struct ifreq ifs[MAX_IFS];
1271 if (IN_CLASSA(addr)) /* determine network mask for address class */
1272 nmask = IN_CLASSA_NET;
1273 else if (IN_CLASSB(addr))
1274 nmask = IN_CLASSB_NET;
1276 nmask = IN_CLASSC_NET;
1277 /* class D nets are disallowed by bad_ip_adrs */
1278 mask = netmask | htonl(nmask);
1281 * Scan through the system's network interfaces.
1283 ifc.ifc_len = sizeof(ifs);
1285 if (ioctl(sockfd, SIOCGIFCONF, &ifc) < 0) {
1286 syslog(LOG_WARNING, "ioctl(SIOCGIFCONF): %m");
1289 ifend = (struct ifreq *) (ifc.ifc_buf + ifc.ifc_len);
1290 for (ifr = ifc.ifc_req; ifr < ifend; ++ifr) {
1292 * Check the interface's internet address.
1294 if (ifr->ifr_addr.sa_family != AF_INET)
1296 ina = ((struct sockaddr_in *) &ifr->ifr_addr)->sin_addr.s_addr;
1297 if ((ntohl(ina) & nmask) != (addr & nmask))
1300 * Check that the interface is up, and not point-to-point or loopback.
1302 strncpy(ifreq.ifr_name, ifr->ifr_name, sizeof(ifreq.ifr_name));
1303 if (ioctl(sockfd, SIOCGIFFLAGS, &ifreq) < 0)
1305 if ((ifreq.ifr_flags & (IFF_UP|IFF_POINTOPOINT|IFF_LOOPBACK))
1309 * Get its netmask and OR it into our mask.
1311 if (ioctl(sockfd, SIOCGIFNETMASK, &ifreq) < 0)
1313 mask |= ((struct sockaddr_in *)&ifreq.ifr_addr)->sin_addr.s_addr;
1320 #define WTMPFILE "/usr/adm/wtmp"
1321 #include <sys/stat.h>
1324 logwtmp(line, name, host)
1325 char *line, *name, *host;
1331 if ((fd = open(WTMPFILE, O_WRONLY|O_APPEND, 0)) < 0)
1333 if (!fstat(fd, &buf)) {
1334 (void)strncpy(ut.ut_line, line, sizeof(ut.ut_line));
1335 (void)strncpy(ut.ut_name, name, sizeof(ut.ut_name));
1336 (void)strncpy(ut.ut_host, host, sizeof(ut.ut_host));
1337 (void)time(&ut.ut_time);
1338 if (write(fd, (char *)&ut, sizeof(struct utmp)) != sizeof(struct utmp))
1339 (void)ftruncate(fd, buf.st_size);
1345 * Code for locking/unlocking the serial device.
1346 * This code is derived from chat.c.
1352 # define LOCK_PREFIX "/usr/spool/locks/LCK.."
1354 # define LOCK_PREFIX "/usr/spool/uucp/LCK.."
1356 #endif /* LOCK_DIR */
1358 static char *lock_file;
1361 * lock - create a lock file for the named device
1367 char hdb_lock_buffer[12];
1371 if ((p = strrchr(dev, '/')) != NULL)
1373 lock_file = malloc(strlen(LOCK_PREFIX) + strlen(dev) + 1);
1374 if (lock_file == NULL)
1375 novm("lock file name");
1376 strcat(strcpy(lock_file, LOCK_PREFIX), dev);
1378 while ((fd = open(lock_file, O_EXCL | O_CREAT | O_RDWR, 0644)) < 0) {
1380 && (fd = open(lock_file, O_RDONLY, 0)) >= 0) {
1381 /* Read the lock file to find out who has the device locked */
1383 n = read(fd, hdb_lock_buffer, 11);
1385 hdb_lock_buffer[n] = 0;
1386 pid = atoi(hdb_lock_buffer);
1389 n = read(fd, &pid, sizeof(pid));
1392 syslog(LOG_ERR, "Can't read pid from lock file %s", lock_file);
1395 if (kill(pid, 0) == -1 && errno == ESRCH) {
1396 /* pid no longer exists - remove the lock file */
1397 if (unlink(lock_file) == 0) {
1399 syslog(LOG_NOTICE, "Removed stale lock on %s (pid %d)",
1403 syslog(LOG_WARNING, "Couldn't remove stale lock on %s",
1406 syslog(LOG_NOTICE, "Device %s is locked by pid %d",
1411 syslog(LOG_ERR, "Can't create lock file %s: %m", lock_file);
1418 sprintf(hdb_lock_buffer, "%10d\n", getpid());
1419 write(fd, hdb_lock_buffer, 11);
1422 write(fd, &pid, sizeof pid);
1430 * unlock - remove our lockfile